Game.cpp

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/*  Project nGenEx
        Destroyer Studios LLC
        Copyright (C) 1997-2004. All Rights Reserved.

        SUBSYSTEM:    nGenEx.lib
        FILE:         Game.cpp
        AUTHOR:       John DiCamillo

*/

#include "MemDebug.h"
#include "Game.h"
#include "Mouse.h"
#include "Universe.h"
#include "Screen.h"
#include "Window.h"
#include "EventDispatch.h"
#include "Color.h"
#include "DataLoader.h"
#include "Keyboard.h"
#include "Pcx.h"
#include "Resource.h"
#include "Bitmap.h"
#include "MachineInfo.h"
#include "Video.h"
#include "VideoFactory.h"
#include "VideoSettings.h"
#include "AviFile.h"
#include "ContentBundle.h"

// +--------------------------------------------------------------------+

FILE*    ErrLog         = 0;
int      ErrLine        = 0;
char     ErrBuf[1024];

Game*    game           = 0;

bool     Game::active         = false;
bool     Game::paused         = false;
bool     Game::server         = false;
bool     Game::show_mouse     = false;
DWORD    Game::base_game_time = 0;
DWORD    Game::real_time      = 0;
DWORD    Game::game_time      = 0;
DWORD    Game::time_comp      = 1;
DWORD    Game::frame_number   = 0;

const int    VIDEO_FPS              = 30;
const double MAX_FRAME_TIME_VIDEO   = 1.0 / (double) VIDEO_FPS;
const double MAX_FRAME_TIME_NORMAL  = 1.0 / 5.0;
const double MIN_FRAME_TIME_NORMAL  = 1.0 / 60.0;

double   Game::max_frame_length = MAX_FRAME_TIME_NORMAL;
double   Game::min_frame_length = MIN_FRAME_TIME_NORMAL;

char     Game::panicbuf[256];

static LARGE_INTEGER  perf_freq;
static LARGE_INTEGER  perf_cnt1;
static LARGE_INTEGER  perf_cnt2;

// +--------------------------------------------------------------------+

Game::Game()
: world(0), video_factory(0), video(0), video_settings(0), soundcard(0),
gamma(128), max_tex_size(2048), screen(0), totaltime(0), 
hInst(0), hwnd(0), frame_rate(0), frame_count(0), frame_count0(0),
frame_time(0), frame_time0(0), gui_seconds(0), content(0),
status(Game::OK), exit_code(0), window_style(0), avi_file(0)
{
        if (!game) {
                panicbuf[0] = 0;
                game = this;
                ZeroMemory(ErrBuf, 1024);

                video_settings = new(__FILE__,__LINE__) VideoSettings;

                is_windowed             = false;
                is_active               = false;
                is_device_lost          = false;
                is_minimized            = false;
                is_maximized            = false;
                ignore_size_change      = false;
                is_device_initialized   = false;
                is_device_restored      = false;
        }
        else
        status = TOO_MANY;
}

Game::~Game()
{
        if (game == this)
        game = 0;

        delete content;
        delete world;
        delete screen;
        delete video_factory;
        delete video;
        delete soundcard;
        delete video_settings;
        delete avi_file;

        if (status == EXIT)
        ShowStats();
}

// +--------------------------------------------------------------------+

HINSTANCE Game::GetHINST()
{
        if (game)
        return game->hInst;

        return 0;
}

HWND Game::GetHWND()
{
        if (game)
        return game->hwnd;

        return 0;
}

bool Game::IsWindowed()
{
        if (game)
        return game->is_windowed;

        return false;
}

// +--------------------------------------------------------------------+

Text
Game::GetText(const char* key)
{
        if (game && game->content && game->content->IsLoaded())
        return game->content->GetText(key);

        return key;
}

// +--------------------------------------------------------------------+

int
Game::GammaLevel()
{
        if (game)
        return game->gamma;

        return 0;
}

void
Game::SetGammaLevel(int g)
{
        if (game) {
                game->gamma = g;

                if (game->video)
                game->video->SetGammaLevel(g);
        }
}

int
Game::MaxTexSize()
{
        if (game && game->video) {
                int max_vid_size = game->video->MaxTexSize();
                return max_vid_size < game->max_tex_size ? 
                max_vid_size : game->max_tex_size;
        }
        else if (Video::GetInstance()) {
                return Video::GetInstance()->MaxTexSize();
        }

        return 256;
}

int
Game::MaxTexAspect()
{
        if (game && game->video) {
                return game->video->MaxTexAspect();
        }
        else if (Video::GetInstance()) {
                return Video::GetInstance()->MaxTexAspect();
        }

        return 1;
}

void
Game::SetMaxTexSize(int n)
{
        if (game && n >= 64 && n <= 4096)
        game->max_tex_size = n;
}

bool
Game::DisplayModeSupported(int w, int h, int bpp)
{
        return game && game->video && game->video->IsModeSupported(w,h,bpp);
}

double
Game::FrameRate()
{
        if (game)
        return game->frame_rate;

        return 0;
}

double
Game::FrameTime()
{
        if (game)
        return game->seconds;

        return 0;
}

double
Game::GUITime()
{
        if (game)
        return game->gui_seconds;

        return 0;
}

// +--------------------------------------------------------------------+

bool
Game::Init(HINSTANCE hi, HINSTANCE hpi, LPSTR cmdline, int nCmdShow)
{
        status = OK;
        hInst  = hi;

        Print("  Initializing Game\n");

        stats.Clear();

        if (!InitApplication(hInst)) {  // Initialize shared things
                Panic("Could not initialize the application.");
                status = INIT_FAILED;
        }

        if (status == OK && !video_settings) {
                Panic("No video settings specified");
                status = INIT_FAILED;
        }

        if (status == OK) {
                static int os_version = MachineInfo::GetPlatform();

                if (os_version == MachineInfo::OS_WIN95 || os_version == MachineInfo::OS_WIN98) {
                        Panic("  Windows 95 and 98 are no longer supported. Please update to Windows XP or higher.");
                        status = INIT_FAILED;
                } else if (os_version == MachineInfo::OS_WINNT) {
                        Panic("  D3D not available under WinNT 4");
                        status = INIT_FAILED;
                } else if (MachineInfo::GetDirectXVersion() < MachineInfo::DX_9) {
                        Panic("  Insufficient DirectX detected (Dx9 IS REQUIRED)");
                        status = INIT_FAILED;
                }

                Print("  Gamma Level = %d\n", gamma);
        }

        if (status == OK) {
                Print("\n  Initializing instance...\n");
                // Perform initializations that apply to a specific instance
                if (!InitInstance(hInst, nCmdShow)) {
                        Panic("Could not initialize the instance.");
                        status = INIT_FAILED;
                }
        }

        if (status == OK) {
                Print("  Initializing content...\n");
                InitContent();

                Print("  Initializing game...\n");
                if (!InitGame()) {
                        if (!panicbuf[0])
                        Panic("Could not initialize the game.");
                        status = INIT_FAILED;
                }
        }

        return status == OK;
}

// +--------------------------------------------------------------------+

bool
Game::InitApplication(HINSTANCE hInstance)
{
        WNDCLASS  wc;
        LOGBRUSH  brush = { BS_SOLID, RGB(0,0,0), 0 };

        if (server)
        brush.lbColor = RGB(255,255,255);

        // Fill in window class structure with parameters that
        // describe the main window.
        wc.style         = CS_HREDRAW | CS_VREDRAW;
        wc.lpfnWndProc   = (WNDPROC) WndProc;
        wc.cbClsExtra    = 0;
        wc.cbWndExtra    = 0;
        wc.hInstance     = hInstance;
        wc.hIcon         = LoadIcon(hInstance, MAKEINTRESOURCE(100));
        wc.hCursor       = LoadCursor(NULL, IDC_ARROW);

        wc.hbrBackground = CreateBrushIndirect(&brush);
        wc.lpszMenuName  = app_name;
        wc.lpszClassName = app_name;

        // Register the window class and return success/failure code.
        if (RegisterClass(&wc) == 0) {
                DWORD err = GetLastError();

                if (err == 1410) // class already exists, this is OK
                return true;

                else
                Print("WARNING: Register Window Class: %08x\n", err);
        }

        return true;
}

// +--------------------------------------------------------------------+

bool
Game::InitInstance(HINSTANCE hInstance, int nCmdShow)
{
        hInst = hInstance;

        // initialize the game timer:
        base_game_time = 0;
        QueryPerformanceFrequency(&perf_freq);
        QueryPerformanceCounter(&perf_cnt1);

        // center window on display:
        int   screenx  = GetSystemMetrics(SM_CXSCREEN);
        int   screeny  = GetSystemMetrics(SM_CYSCREEN);
        int   x_offset = 0;
        int   y_offset = 0;
        int   s_width  = 800;
        int   s_height = 600;

        if (server) {
                s_width  = 320;
                s_height = 200;
        }

        else if (video_settings) {
                s_width  = video_settings->window_width;
                s_height = video_settings->window_height;
        }

        if (s_width < screenx)
        x_offset = (screenx - s_width) / 2;

        if (s_height < screeny)
        y_offset = (screeny - s_height) / 2;

        // Create a main window for this application instance
        RECT  rctmp;
        rctmp.left   = x_offset;
        rctmp.top    = y_offset;
        rctmp.right  = x_offset + s_width;
        rctmp.bottom = y_offset + s_height;

        window_style = WS_OVERLAPPED  | WS_CAPTION     | WS_SYSMENU | WS_THICKFRAME | 
        WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_VISIBLE;

        AdjustWindowRect(&rctmp, window_style, 1);

        hwnd = CreateWindow(
        app_name,                  // Class name
        app_name,                  // Caption

        window_style,

        x_offset,                  // Position
        y_offset,

        rctmp.right - rctmp.left,  // Size
        rctmp.bottom - rctmp.top,

        0,                         // Parent window (no parent)
        0,                         // use class menu
        hInst,                     // handle to window instance
        0);                        // no params to pass on

        // If window could not be created, return "failure"
        if (!hwnd) {
                Panic("Could not create window\n");
                return false;
        }

        Print("  Window created.\n");

        // Make the window visible and draw it
        ShowWindow(hwnd, nCmdShow); // Show the window
        UpdateWindow(hwnd);         // Sends WM_PAINT message

        // Save window properties
        window_style = GetWindowLong(hwnd, GWL_STYLE);
        GetWindowRect(hwnd, &bounds_rect);
        GetClientRect(hwnd, &client_rect);

        // Use client area to set video window size
        video_settings->window_width  = client_rect.right - client_rect.left;
        video_settings->window_height = client_rect.bottom - client_rect.top;

        Print("  Instance initialized.\n");
        return true;
}

// +--------------------------------------------------------------------+

bool
Game::InitVideo()
{
        if (server) return true;

        // create a video factory, and video object:
        video_factory = new(__FILE__,__LINE__) VideoFactory(hwnd);

        if (video_factory) {
                Print("  Init Video...\n");
                Print("  Request %s mode\n", video_settings->GetModeDescription());

                video = video_factory->CreateVideo(video_settings);

                if (video) {
                        if (!video->IsHardware()) {
                                video_factory->DestroyVideo(video);
                                video = 0;

                                Panic("3D Hardware Not Found");
                        }

                        // save a copy of the device-specific video settings:
                        else if (video->GetVideoSettings()) {
                                *video_settings = *video->GetVideoSettings();
                                is_windowed = video_settings->IsWindowed();
                        }
                }

                soundcard = video_factory->CreateSoundCard();
        }

        return (video && video->Status() == Video::VIDEO_OK);
}

// +--------------------------------------------------------------------+

bool
Game::ResetVideo()
{
        if (server)          return true;
        if (!video_factory)  return InitVideo();

        Print("  Reset Video...\n");
        Print("  Request %s mode\n", video_settings->GetModeDescription());

        delete screen;

        if (video && !video->Reset(video_settings)) {
                video_factory->DestroyVideo(video);
                video = video_factory->CreateVideo(video_settings);
        }

        if (!video || video->Status() != Video::VIDEO_OK) {
                Panic("Could not re-create Video Interface.");
                return false;
        }

        Print("  Re-created video object.\n");

        // save a copy of the device-specific video settings:
        if (video->GetVideoSettings()) {
                *video_settings = *video->GetVideoSettings();
                is_windowed = video_settings->IsWindowed();
        }

        Color::UseVideo(video);

        screen = new(__FILE__,__LINE__) Screen(video);
        if (!screen) {
                Panic("Could not re-create Screen object.");
                return false;
        }

        Print("  Re-created screen object.\n");

        if (!screen->SetBackgroundColor(Color::Black))
        Print("  WARNING: could not set video background color to Black\n");

        screen->ClearAllFrames(true);
        video->SetGammaLevel(gamma);

        Print("  Re-established requested video parameters.\n");

        Bitmap::CacheUpdate();
        Print("  Refreshed texture bitmaps.\n\n");
        return true;
}

// +--------------------------------------------------------------------+

bool
Game::ResizeVideo()
{
        if (!video || !video_settings)   return false;
        if (!is_windowed)                return false;
        if (ignore_size_change)          return true;

        HRESULT  hr = S_OK;
        RECT     client_old;

        client_old = client_rect;

        // Update window properties
        GetWindowRect(hwnd, &bounds_rect);
        GetClientRect(hwnd, &client_rect);

        if (client_old.right   - client_old.left  !=
                        client_rect.right  - client_rect.left ||
                        client_old.bottom  - client_old.top   !=
                        client_rect.bottom - client_rect.top) {

                // A new window size will require a new backbuffer
                // size, so the 3D structures must be changed accordingly.
                Pause(true);

                video_settings->is_windowed   = true;
                video_settings->window_width  = client_rect.right - client_rect.left;
                video_settings->window_height = client_rect.bottom - client_rect.top;

                ::Print("ResizeVideo() %d x %d\n", video_settings->window_width, video_settings->window_height);

                if (video) {
                        video->Reset(video_settings);
                }

                Pause(false);
        }

        // save a copy of the device-specific video settings:
        if (video->GetVideoSettings()) {
                *video_settings = *video->GetVideoSettings();
                is_windowed = video_settings->IsWindowed();
        }

        screen->Resize(video_settings->window_width, video_settings->window_height);

        return hr == S_OK;
}

bool
Game::ToggleFullscreen()
{
        bool result = false;

        if (video && video_settings) {
                Pause(true);
                ignore_size_change = true;

                // Toggle the windowed state
                is_windowed = !is_windowed;
                video_settings->is_windowed = is_windowed;

                // Prepare window for windowed/fullscreen change
                AdjustWindowForChange();

                // Reset the 3D device
                if (!video->Reset(video_settings)) {
                        // reset failed, try to restore...
                        ignore_size_change = false;

                        if (!is_windowed) {
                                // Restore window type to windowed mode
                                is_windowed = !is_windowed;
                                video_settings->is_windowed = is_windowed;

                                AdjustWindowForChange();

                                SetWindowPos(hwnd,
                                HWND_NOTOPMOST,
                                bounds_rect.left, 
                                bounds_rect.top,
                                bounds_rect.right  - bounds_rect.left,
                                bounds_rect.bottom - bounds_rect.top,
                                SWP_SHOWWINDOW);
                        }

                        ::Print("Unable to toggle %s fullscreen mode.\n", is_windowed ? "into" : "out of");
                }

                else {
                        ignore_size_change = false;

                        // When moving from fullscreen to windowed mode, it is important to
                        // adjust the window size after resetting the device rather than
                        // beforehand to ensure that you get the window size you want.  For
                        // example, when switching from 640x480 fullscreen to windowed with
                        // a 1000x600 window on a 1024x768 desktop, it is impossible to set
                        // the window size to 1000x600 until after the display mode has
                        // changed to 1024x768, because windows cannot be larger than the
                        // desktop.

                        if (is_windowed) {
                                SetWindowPos(hwnd,
                                HWND_NOTOPMOST,
                                bounds_rect.left, 
                                bounds_rect.top,
                                bounds_rect.right  - bounds_rect.left,
                                bounds_rect.bottom - bounds_rect.top,
                                SWP_SHOWWINDOW);
                        }

                        GetClientRect(hwnd, &client_rect);  // Update our copy
                        Pause(false);

                        if (is_windowed)
                        screen->Resize(video_settings->window_width,
                        video_settings->window_height);

                        else
                        screen->Resize(video_settings->fullscreen_mode.width,
                        video_settings->fullscreen_mode.height);

                        result = true;
                }
        }

        return result;
}

bool
Game::AdjustWindowForChange()
{
        if (is_windowed) {
                // Set windowed-mode style
                SetWindowLong(hwnd, GWL_STYLE, window_style);
                if (hmenu != NULL) {
                        SetMenu(hwnd, hmenu);
                        hmenu = NULL;
                }
        }
        else {
                // Set fullscreen-mode style
                SetWindowLong(hwnd, GWL_STYLE, WS_POPUP|WS_SYSMENU|WS_VISIBLE);
                if (hmenu == NULL) {
                        hmenu = GetMenu(hwnd);
                        SetMenu(hwnd, NULL);
                }
        }

        return true;
}


// +--------------------------------------------------------------------+

bool
Game::InitGame()
{
        if (server) {
                Print("  InitGame() - server mode.\n");
        }

        else {
                if (!SetupPalette()) {
                        Panic("Could not set up the palette.");
                        return false;
                }

                Print("  Palette loaded.\n");

                if (!InitVideo() || !video || video->Status() != Video::VIDEO_OK) {
                        if (!panicbuf[0])
                        Panic("Could not create the Video Interface.");
                        return false;
                }

                Print("  Created video object.\n");

                Color::UseVideo(video);

                screen = new(__FILE__,__LINE__) Screen(video);
                if (!screen) {
                        if (!panicbuf[0])
                        Panic("Could not create the Screen object.");
                        return false;
                }

                Print("  Created screen object.\n");

                if (!screen->SetBackgroundColor(Color::Black))
                Print("  WARNING: could not set video background color to Black\n");
                screen->ClearAllFrames(true);

                video->SetGammaLevel(gamma);

                Print("  Established requested video parameters.\n\n");
        }

        return true;
}


// +--------------------------------------------------------------------+

bool
Game::InitContent()
{
        DataLoader* loader = DataLoader::GetLoader();
        List<Text>  bundles;

        loader->SetDataPath("Content/");
        loader->ListFiles("content*", bundles);

        ListIter<Text> iter = bundles;
        while (++iter) {
                Text* filename = iter.value();
                int   n        = filename->indexOf('_');

                if (n > 0) {
                        Locale::ParseLocale(filename->data() + n);
                }
                else {
                        delete content;
                        content = new(__FILE__,__LINE__) ContentBundle("content", 0);
                }
        }

        loader->SetDataPath(0);
        return true;
}

void
Game::UseLocale(Locale* locale)
{
        if (game) {
                DataLoader* loader = DataLoader::GetLoader();
                loader->SetDataPath("Content/");
                delete game->content;

                game->content = new(__FILE__,__LINE__) ContentBundle("content", locale);

                loader->SetDataPath(0);
        }
}

// +--------------------------------------------------------------------+

bool
Game::SetupPalette()
{
        if (LoadPalette(standard_palette, inverse_palette)) {
                Color::SetPalette(standard_palette, 256, inverse_palette);
                return true;
        }

        return false;
}   

// +--------------------------------------------------------------------+

bool
Game::LoadPalette(PALETTEENTRY* pal, BYTE* inv)
{
        char palheader[32];
        struct {
                WORD Version;
                WORD NumberOfEntries;
                PALETTEENTRY Entries[256];

        } Palette = { 0x300, 256 };

        DataLoader* loader = DataLoader::GetLoader();
        BYTE* block;
        char fname[256];
        sprintf_s(fname, "%s.pal", palette_name);

        if (!loader->LoadBuffer(fname, block)) {
                Print("  Could not open file '%s'\n", fname);
                return false;
        }

        memcpy(&palheader, block, 24);
        memcpy((char*) Palette.Entries, (block+24), 256*4);

        for (int i = 0; i < 256; i++) {
                *pal++ = Palette.Entries[i];
        }

        loader->ReleaseBuffer(block);

        sprintf_s(fname, "%s.ipl", palette_name);
        int size = loader->LoadBuffer(fname, block);
        if (size < 32768) {
                Print("  Could not open file '%s'\n", fname);
                return false;
        }

        memcpy(inv, block, 32768);
        loader->ReleaseBuffer(block);

        return true;
}

// +--------------------------------------------------------------------+

int 
Game::Run()
{
        MSG msg;

        status = RUN;
        Print("\n");
        Print("+====================================================================+\n");
        Print("|                              RUN                                   |\n");
        Print("+====================================================================+\n");

        // Polling messages from event queue until quit
        while (status < EXIT) {
                if (PeekMessage(&msg, hwnd, 0, 0, PM_REMOVE)) {
                        if (msg.message == WM_QUIT)
                        break;

                        TranslateMessage(&msg);
                        DispatchMessage(&msg);
                }
                else {
                        if (ProfileGameLoop())
                        WaitMessage();
                }
        }

        return exit_code ? exit_code : msg.wParam;
}

// +--------------------------------------------------------------------+

void
Game::Exit()
{
        Print("\n\n*** Game::Exit()\n");
        status = EXIT;
}

void
Game::Panic(const char* msg)
{
        if (msg) Print("*** PANIC: %s\n", msg);
        else     Print("*** PANIC! ***\n");

        if (!msg) msg = "Unspecified fatal error.";
        sprintf_s(panicbuf, "%s\nThis game will now terminate.", msg);

        if (game) {
                game->status = PANIC;
        }
}

// +--------------------------------------------------------------------+

void
Game::Activate(bool f)
{
        active = f;

        if (active && video)
        video->InvalidateCache();
}

// +--------------------------------------------------------------------+

void
Game::Pause(bool f)
{
        if (f) {
                if (soundcard)
                soundcard->Pause();
                paused = true;
        }
        else {
                if (soundcard)
                soundcard->Resume();
                paused = false;
        }
}

// +--------------------------------------------------------------------+

bool ProfileGameLoop(void)
{
        return game->GameLoop();
}

bool
Game::GameLoop()
{
        bool wait_for_windows_events = true;

        if (active && !paused) {
                if (!server) {
                        // Route Events to EventTargets
                        EventDispatch* ed = EventDispatch::GetInstance();
                        if (ed)
                        ed->Dispatch();
                }

                UpdateWorld();
                GameState();

                if (!server) {
                        UpdateScreen();
                        CollectStats();
                }

                wait_for_windows_events = false;
        }
        else if (active && paused) {
                if (GetKey()=='P')
                Pause(false);
        }

        QueryPerformanceCounter(&perf_cnt2);

        double freq = (double) (perf_freq.QuadPart);
        double msec = (double) (perf_cnt2.QuadPart - perf_cnt1.QuadPart);

        msec /= freq;
        msec *= 1000.0;

        if (msec < 1)
        msec = 1;

        real_time += (DWORD) msec;

        frame_number++;
        Mouse::w = 0;

        perf_cnt1 = perf_cnt2;

        return wait_for_windows_events;
}

// +--------------------------------------------------------------------+

void
Game::UpdateWorld()
{
        long   new_time      = real_time;
        double delta         = new_time - frame_time;
        gui_seconds   = delta * 0.001;
        seconds       = max_frame_length;

        if (time_comp == 1)
        {
                if (delta < max_frame_length * 1000)
                seconds = delta * 0.001;
        }
        else
        {
                seconds = time_comp * delta * 0.001;
        }

        frame_time = new_time;
        game_time += (DWORD) (seconds * 1000);

        if (world)
        world->ExecFrame(seconds);
}

// +--------------------------------------------------------------------+

void
Game::GameState()
{
}

// +--------------------------------------------------------------------+

void
Game::UpdateScreen()
{
        if (!screen || !video) return;

        if (screen->Refresh()) {
                if (Keyboard::KeyDown(VK_F12)) {
                        if (Keyboard::KeyDown(VK_SHIFT)) {
                                if (!avi_file) {
                                        AVICapture();                    // begin capturing
                                        SetMaxFrameLength(MAX_FRAME_TIME_VIDEO);
                                }
                                else {
                                        delete avi_file;                 // end capture;
                                        avi_file = 0;
                                        SetMaxFrameLength(MAX_FRAME_TIME_NORMAL);
                                }
                        }
                        else {
                                if (!avi_file) {
                                        ScreenCapture();
                                }
                                else {
                                        delete avi_file;                 // end capture;
                                        avi_file = 0;
                                        SetMaxFrameLength(MAX_FRAME_TIME_NORMAL);
                                }
                        }
                }
                else if (avi_file) {
                        AVICapture();                          // continue capturing...
                }

                video->Present();
        }
        else {
                Panic("Screen refresh failed.");
        }
}

// +--------------------------------------------------------------------+

Game*
Game::GetInstance()
{
        return game;
}

Video*
Game::GetVideo()
{
        if (game)
        return game->video;

        return 0;
}

Color
Game::GetScreenColor()
{
        if (game)
        return game->screen_color;

        return Color::Black;
}

void
Game::SetScreenColor(Color c)
{
        if (game) {
                game->screen_color = c;

                if (game->screen)
                game->screen->SetBackgroundColor(c);
        }
}

int
Game::GetScreenWidth()
{
        if (game && game->video)
        return game->video->Width();

        return 0;
}

int
Game::GetScreenHeight()
{
        if (game && game->video)
        return game->video->Height();

        return 0;
}

// +--------------------------------------------------------------------+

void
Game::ScreenCapture(const char* name)
{
        if (server || !video || !screen) return;

        static DWORD last_shot = 0;
        static DWORD shot_num  = 1;
        DataLoader*  loader    = DataLoader::GetLoader();
        char         filename[256];

        if (!name && (real_time - last_shot) < 1000)
        return;

        // try not to overwrite existing screen shots...
        if (loader) {
                bool use_file_sys = loader->IsFileSystemEnabled();
                loader->UseFileSystem(true);
                loader->SetDataPath(0);
                List<Text> shot_list;
                loader->ListFiles("*.PCX", shot_list);
                loader->UseFileSystem(use_file_sys);

                for (int i = 0; i < shot_list.size(); i++) {
                        Text* s = shot_list[i];
                        int   n = 0;

                        sscanf_s(s->data()+1, "%d", &n);
                        if (shot_num <= (DWORD) n)
                        shot_num = n+1;
                }

                shot_list.destroy();
        }

        if (name)
        strcpy_s(filename, name);
        else
        sprintf_s(filename, "A%d.PCX", shot_num++);

        Bitmap bmp;

        if (video && video->Capture(bmp)) {
                PcxImage pcx(bmp.Width(), bmp.Height(), (LPDWORD) bmp.HiPixels());
                pcx.Save((char*) filename);
        }

        last_shot = real_time;
}

// +--------------------------------------------------------------------+

void
Game::AVICapture(const char* name)
{
        if (server || !video || !screen) return;

        if (!avi_file) {
                char        filename[256];
                Bitmap      bmp;
                DataLoader* loader    = DataLoader::GetLoader();
                DWORD       avi_num   = 1;

                // try not to overwrite existing screen shots...
                if (loader) {
                        bool use_file_sys = loader->IsFileSystemEnabled();
                        loader->UseFileSystem(true);
                        loader->SetDataPath(0);
                        List<Text> avi_list;
                        loader->ListFiles("*.avi", avi_list);
                        loader->UseFileSystem(use_file_sys);

                        for (int i = 0; i < avi_list.size(); i++) {
                                Text* s = avi_list[i];
                                int   n = 0;

                                sscanf_s(s->data()+1, "%d", &n);
                                if (avi_num <= (DWORD) n)
                                avi_num = n+1;
                        }

                        avi_list.destroy();
                }

                if (name)
                strcpy_s(filename, name);
                else
                sprintf_s(filename, "A%d.avi", avi_num);

                if (video && video->Capture(bmp)) {
                        //bmp.ScaleTo(bmp.Width()/2, bmp.Height()/2);
                        avi_file = new(__FILE__,__LINE__) AviFile(filename, Rect(0,0,bmp.Width(),bmp.Height()), VIDEO_FPS);
                }

        }

        else {
                Bitmap bmp;

                if (video && video->Capture(bmp)) {
                        //bmp.ScaleTo(bmp.Width()/2, bmp.Height()/2);
                        avi_file->AddFrame(bmp);
                }
        }
}



// +--------------------------------------------------------------------+

void
Game::CollectStats()
{
        frame_count++;

        if (!totaltime) totaltime = real_time;

        if (frame_time - frame_time0 > 200) {
                frame_rate   = (frame_count - frame_count0) * 1000.0 / (frame_time - frame_time0);
                frame_time0  = frame_time;
                frame_count0 = frame_count;
        }

        if (video) {
                stats.nframe  = video->GetStats().nframe;
                stats.nverts  = video->GetStats().nverts;
                stats.npolys  = video->GetStats().npolys;
                stats.nlines  = video->GetStats().nlines;
                stats.ncalls += video->GetStats().ncalls;

                stats.total_verts += stats.nverts;
                stats.total_polys += stats.npolys;
                stats.total_lines += stats.nlines;
        }
}

// +--------------------------------------------------------------------+

void
Game::ShowStats()
{
        if (server) return;

        totaltime = real_time - totaltime;

        Print("\n");
        Print("Performance Data:\n");
        Print("-----------------\n");

        Print("   Time:            %d msec\n", totaltime);
        Print("   Frames:          %d\n", stats.nframe);
        Print("   Polys Rendered:  %d\n", stats.total_polys);
        Print("   Lines Rendered:  %d\n", stats.total_lines);
        Print("   Verts Rendered:  %d\n", stats.total_verts);
        Print("   Render Calls:    %d\n", stats.ncalls);
        Print("\n");

        Print("Performance Statistics:\n");
        Print("-----------------------\n");

        Print("   Frames/Second:   %.2f\n", (stats.nframe * 1000.0)      / totaltime);
        Print("   Polys/Frame:     %.2f\n", (double) stats.total_polys   / (double) stats.nframe);
        Print("   Polys/Call:      %.2f\n", (double) stats.total_polys   / (double) stats.ncalls);
        Print("   Polys/Second:    %.2f\n", (stats.total_polys * 1000.0) / totaltime);
        Print("   Lines/Second:    %.2f\n", (stats.total_lines * 1000.0) / totaltime);
        Print("   Verts/Second:    %.2f\n", (stats.total_verts * 1000.0) / totaltime);

        Print("\n");
}

// +====================================================================+
// WndProc
// +====================================================================+

#ifndef WM_MOUSEWHEEL
#define WM_MOUSEWHEEL 0x20A
#endif

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM uParam, LPARAM lParam)
{
        switch (message) {
        case WM_SYSKEYDOWN:
                if (uParam == VK_TAB || uParam == VK_F4)
                return DefWindowProc(hwnd, message, uParam, lParam);

                return 0;

        case WM_MENUCHAR:
                return MNC_CLOSE << 16;

        case WM_ACTIVATEAPP:
                // Keep track of whether or not the app is in the foreground
                if (game)
                game->Activate(uParam?true:false);
                break;

        case WM_PAINT:
                if (!game || !game->OnPaint())
                return DefWindowProc(hwnd, message, uParam, lParam);
                break;

        case WM_SETCURSOR:
                if (Game::ShowMouse()) {
                        return DefWindowProc(hwnd, message, uParam, lParam);
                }
                else {
                        // hide the windows mouse cursor
                        SetCursor(NULL);
                        return 1;
                }
                break;

        case WM_ENTERSIZEMOVE:
                // Halt frame movement while the app is sizing or moving
                if (game)
                game->Pause(true);
                break;

        case WM_SIZE:
                // Pick up possible changes to window style due to maximize, etc.
                if (game && game->hwnd != NULL ) {
                        game->window_style = GetWindowLong(game->hwnd, GWL_STYLE );

                        if (uParam == SIZE_MINIMIZED) {
                                game->Pause(true); // Pause while we're minimized
                                game->is_minimized = true;
                                game->is_maximized = false;
                        }

                        else if (uParam == SIZE_MAXIMIZED) {
                                if (game->is_minimized)
                                game->Pause(false); // Unpause since we're no longer minimized

                                game->is_minimized = false;
                                game->is_maximized = true;
                                game->ResizeVideo();
                        }

                        else if (uParam == SIZE_RESTORED) {
                                if (game->is_maximized) {
                                        game->is_maximized = false;
                                        game->ResizeVideo();
                                }

                                else if (game->is_minimized) {
                                        game->Pause(false); // Unpause since we're no longer minimized
                                        game->is_minimized = false;
                                        game->ResizeVideo();
                                }
                                else {
                                        // If we're neither maximized nor minimized, the window size 
                                        // is changing by the user dragging the window edges.  In this 
                                        // case, we don't reset the device yet -- we wait until the 
                                        // user stops dragging, and a WM_EXITSIZEMOVE message comes.
                                }
                        }
                }
                break;

        case WM_EXITSIZEMOVE:
                if (game) {
                        game->Pause(false);
                        game->ResizeVideo();
                }
                break;


        case WM_ENTERMENULOOP:
                if (game)
                game->Pause(true);
                break;

        case WM_EXITMENULOOP:
                if (game)
                game->Pause(false);
                break;

                /*
case WM_HELP:
        if (game)
                return game->OnHelp();
        break;
*/

        case WM_KEYDOWN:
                BufferKey(uParam);
                return 0;

        case WM_DESTROY:
                PostQuitMessage(0);
                break;

        case WM_MOUSEMOVE:
                Mouse::x = LOWORD(lParam);
                Mouse::y = HIWORD(lParam);
                break;

        case WM_LBUTTONDOWN:
                Mouse::l = 1;
                break;

        case WM_LBUTTONDBLCLK:
                Mouse::l = 2;
                break;

        case WM_LBUTTONUP:
                Mouse::l = 0;
                break;

        case WM_MBUTTONDOWN:
                Mouse::m = 1;
                break;

        case WM_MBUTTONDBLCLK:
                Mouse::m = 2;
                break;

        case WM_MBUTTONUP:
                Mouse::m = 0;
                break;

        case WM_RBUTTONDOWN:
                Mouse::r = 1;
                break;

        case WM_RBUTTONDBLCLK:
                Mouse::r = 2;
                break;

        case WM_RBUTTONUP:
                Mouse::r = 0;
                break;

        case WM_MOUSEWHEEL:
                {
                        int w = (int) (uParam >> 16);
                        if (w > 32000) w -= 65536;
                        Mouse::w += w;
                }
                break;

        case WM_CLOSE:
                if (game) // && game->Server())
                game->Exit();
                break;

        default:
                return DefWindowProc(hwnd, message, uParam, lParam);
        }

        return 0;
}

// +====================================================================+

const int MAX_KEY_BUF = 512;
static int vkbuf[MAX_KEY_BUF];
static int vkshiftbuf[MAX_KEY_BUF];
static int vkins = 0;
static int vkext = 0;

void
FlushKeys()
{
        Keyboard::FlushKeys();
        vkins = vkext = 0;
}

void
BufferKey(int vkey)
{
        if (vkey < 1) return;

        int shift = 0;

        if (GetAsyncKeyState(VK_SHIFT))
        shift |= 1;

        if (GetAsyncKeyState(VK_CONTROL))
        shift |= 2;

        if (GetAsyncKeyState(VK_MENU))
        shift |= 4;

        vkbuf[vkins] = vkey;
        vkshiftbuf[vkins++] = shift;

        if (vkins >= MAX_KEY_BUF)
        vkins = 0;

        if (vkins == vkext) {
                vkext++;
                if (vkext >= MAX_KEY_BUF)
                vkext = 0;
        }   
}

int
GetKey()
{
        if (vkins == vkext) return 0;

        int result = vkbuf[vkext++];
        if (vkext >= MAX_KEY_BUF)
        vkext = 0;

        return result;
}

int
GetKeyPlus(int& key, int& shift)
{
        if (vkins == vkext) return 0;

        key = vkbuf[vkext];
        shift = vkshiftbuf[vkext++];

        if (vkext >= MAX_KEY_BUF)
        vkext = 0;

        return key;
}

// +====================================================================+

void Print(const char* fmt, ...)
{
        if (ErrLog) {
                vsprintf_s(ErrBuf, fmt, (char *)(&fmt+1));

                fprintf(ErrLog, ErrBuf);
                fflush(ErrLog);
        }
}

// +====================================================================+

DWORD GetRealTime()
{
        if (game)
        return Game::RealTime();

        return timeGetTime();
}

DWORD Game::RealTime()
{
        return real_time;
}

DWORD Game::GameTime()
{
        return game_time;
}

DWORD Game::TimeCompression()
{
        return time_comp;
}

void Game::SetTimeCompression(DWORD comp)
{
        if (comp > 0 && comp <= 100)
        time_comp = comp;
}

DWORD Game::Frame()
{
        return frame_number;
}

void Game::ResetGameTime()
{
        game_time = 0;
}

void Game::SkipGameTime(double seconds)
{
        if (seconds > 0)
        game_time += (DWORD) (seconds * 1000);
}